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Name: OPA111AM
Brand: Texas Instruments
SKU: OPA111AM
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

Any Feature, including a modified Existing Feature, that is not an Existing Feature.

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Texas Instruments OPA111AM

Part No.:: OPA111AM

Manufacturer:: Texas Instruments

Package:: TO-99-8 Metal Can

Datasheet:: OPA111AM.pdf

Description:: IC INST AMP 1 CIRCUIT TO99-8

In Stock:: 3365

Quantity:: Add To Cart

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OPA111AM Specifications

Package/Case:
TO-99-8 Metal Can
Packaging:
Bulk,Tube
Series:
Difet®
ProductStatus:
Obsolete
AmplifierType:
Instrumentation
NumberofCircuits:
1
OutputType:
-
SlewRate:
2V/µs
GainBandwidthProduct:
2 MHz
-3dbBandwidth:
-
Current-InputBias:
0.8 pA
Voltage-InputOffset:
100 µV
Current-Supply:
2.5mA
Current-Output/Channel:
10 mA
Voltage-SupplySpan(Min):
10 V
Voltage-SupplySpan(Max):
36 V
OperatingTemperature:
-25°C ~ 85°C
MountingType:
Through Hole

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OPA111AM information

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OPA111AM Typical application Circuitry

OPA111AM

The OPA111AM is a precision operational amplifier (op-amp) known for its high accuracy, low noise, and exceptional stability. It is designed for applications requiring precise signal conditioning, such as instrumentation, test equipment, and high-fidelity audio applications.

Key Features of the OPA111AM

- Low Offset Voltage: Ensures high accuracy in signal amplification, critical for precision measurements.

- Low Temperature Drift: Provides stable performance across a wide range of temperatures, enhancing reliability in fluctuating conditions.

- High Input Impedance: Minimizes loading on the signal source, preserving the original signal.

- Low Noise: Ideal for applications where signal purity is crucial, such as audio processing or sensitive instrumentation.

- Wide Supply Voltage Range: Accommodates various power supply configurations, offering flexibility in system design.

Application Scenario: High-Precision Instrumentation Amplifier

A common application for the OPA111AM is in a high-precision instrumentation amplifier configuration, used for amplifying small differential signals in the presence of large common-mode voltages, such as in medical instrumentation or strain gauge sensors.

Detailed Circuit Connection

Differential Signal Input: Connect the outputs of a precision sensor (e.g., a strain gauge) to the inverting (Pin 2) and non-inverting (Pin 3) inputs of the first OPA111AM op-amp. Accurate signal capture is essential for maintaining the fidelity of the measurement.

Gain Setting: Establish a feedback loop for the first OPA111AM by connecting a precision resistor between its output (Pin 6) and its inverting input (Pin 2). A second precision resistor connects from Pin 2 to ground. This setup is critical for setting the initial stage gain while preserving signal accuracy.

Buffering and Further Amplification: Utilize a second OPA111AM as a buffer to isolate the first stage and provide additional gain if necessary. The output of the first op-amp connects to the non-inverting input of the second OPA111AM (Pin 3), with a similar feedback loop established to control gain. This stage ensures high input impedance and minimal loading on the first stage.

Power Supply Configuration: Power the OPA111AMs by connecting a positive voltage to Pin 7 and a negative voltage to Pin 4. Ensuring a stable and clean power supply is vital for minimizing operational noise and ensuring the accuracy of the amplification.

Output to ADC or Display: The output from the second OPA111AM (Pin 6) is directed to an analog-to-digital converter (ADC) or a display unit. Maintaining signal integrity in this path is crucial for accurate data representation.

Design Considerations

When integrating the OPA111AM into a high-precision instrumentation amplifier circuit, several critical aspects must be carefully considered:

- Power Supply Quality: A clean and stable power supply is critical to fully leverage the low noise and high accuracy of the OPA111AM.

- Component Precision: Use precision resistors in the feedback loops to maintain the accuracy of gain settings and ensure stability over temperature variations.

- Thermal Considerations: Account for the potential impact of temperature on the OPA111AM and passive components, choosing components with low temperature coefficients to minimize drift.

- Signal Path Integrity: Design the signal paths from the sensor to the op-amp and from the op-amp to subsequent stages to minimize losses and interference, ensuring high-fidelity signal processing.

- PCB Layout: Optimize the PCB layout to reduce noise coupling, especially in the vicinity of the OPA111AM inputs and outputs, to preserve signal quality.

By addressing these design considerations, engineers can effectively utilize the OPA111AM in creating high-precision, stable instrumentation amplifiers, taking advantage of its exceptional accuracy, low noise, and stable performance across varying conditions.

OPA111AM FAQ

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6. What is the process for return or replacement of OPA111AM?

All goods will implement Pre-Shipment Inspection (PSI), selected at random from all batches of your order to do a systematic inspection before arranging the shipment. If there is something wrong with the OPA111AM we delivered, we will accept the replacement or return of the OPA111AM only when all of the below conditions are fulfilled:

(1)Such as a deficiency in quantity, delivery of wrong items, and apparent external defects (breakage and rust, etc.), and we acknowledge such problems.

(2)We are informed of the defect described above within 90 days after the delivery of OPA111AM.

(3)The PartNo is unused and only in the original unpacked packaging.

Two processes to return the products:

(1)Inform us within 90 days

(2)Obtain Requesting Return Authorizations